You better get on your bike if you want to be part of a popular cycle event.

Dorset and Somerset Air Ambulance is once again encouraging supporters to sign up early for its Coast to Coast Cycle Challenge 2018.

The 2017 event sold out within hours of online registration being open, so people have to be quick to secure a place.

Demand for places is expected to be even higher this year.

The event, which is not designed as a race involves cycling through some of Dorset and Somerset’s most beautiful countryside and takes place on Sunday, May 13.

Last year’s event raised more than £74,000 (including gift aid).

Online registration will open at 10am on Tuesday, Dec 5, via dsairambulance.org.uk

With only 600 places available, those wishing to take part will need to be quick to avoid disappointment. Participants can enter as an individual or as a team.

It costs £20 for adults and £10 for under 16s.

The Coast to Coast Cycle Challenge offers two different routes and distances. For those who like a challenge, the 54 mile cycle which starts in the Somerset port of Watchet and finishes at West Bay. A staggered start sees the stronger cyclists set off first at 11am with the less experienced riders departing at 11.15am.

A shorter 11 mile route starts at the Royal Oak pub in Drimpton at 2pm and also finishes at West Bay.

Bill Sivewright, Dorset and Somerset Air Ambulance chief executive officer said, “We are thrilled to be able to announce the date for our Coast to Coast Cycle Challenge 2018. This will be our eighth year in the saddle and every year the event seems to get better and better.

“We always strive to build on the success of the previous year and with this in mind we are once again restricting our numbers to 600 cyclists."

He added: “With such a demand, there will undoubtedly be those who are disappointed not to gain a place which is why I cannot stress enough, how important it is to register early. We also hope that those who are fortunate to gain a place will once again encourage their family and friends to sponsor them in a bid to make 2018 the best Coast to Coast Cycle Challenge yet.”

Dorset and Somerset Air Ambulance has flown more than 12,000 missions since its launch in March 2000, saving many lives and aiding recovery with outstanding immediate care and rapid delivery to the hospital best suited to meet the patient’s needs.

The charity relies on the generosity of the public and events like Coast to Coast for support.